Type-writing machine.



E. B. HESS.

TYPE WRITING MACHINE.

APPLICATION FILED 0013.80, 1908.

Patented June 4, 1912.

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El 13. HESS.

TYPE WRITING MACHINE;

APPLIOATIOH-PILED 001230, 1908.

Patented June 4, 1912.

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m wE EIIH ATTORNEY E. B. HESS.

TYPE WRITING MACHINE. APPLIOA'IION FILED 00130, 1908.

LUQQEQ Patented June 4,1912.

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A 7 TUBA/E Y E. B. HESS.

TYPEWBIITING MACHINE. I APPLICATION rum) 001290, 1908 Patented June 4, 1912.

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INTO/ME) 'nnwannn. HESS, organ-w YORK, 1v. 2., ASSIGNOR TO ROYAL TYPEWBITER COMPANY, or ew YORK, N Y., A conronarron or NEWJERSEY.

TYEE-WRITING MACHINE.

To all whom it may concem:

citizen of the United States of America,'re-

siding in the borough of Manhattan. city,

county, and 'State of New York, have invented certain Improvements'in Type-Writing Machines, of which the following is a specification.

This invention relates primarily to a front strike typewriting machine.

In Letters Patent of the United States heretofore granted to me, I have shown a -break1ng or accelerating toggle flexing link connection acted upon on depression of the finger pieee to pull the type bar to the printing point with -an increasing velocity. In machines constructed in accordance with the present invention, I employ two such flexing connections, one acted upon on depres'sion of a finger piece and it in turn acting upon the other which is directly connected to the type bar. The result is that the accelerating breaking toggle connection acted upon by depression of the finger piece has a partacting with increasing velocity upon the second such connection which has a part acting in. turn because of its own movement with an increasing acceleration upon the type bar. In a front strike type-- writing machine employing two such accelerating or breaking toggle or flexing connections, the one applied to the type bar would ordinarily be disposed in rear of the type bar pivot and would most conveniently be disposed vertically and the other, acted upon on depression of the finger piece,

would be connected to the first one and would most conveniently extend forward under the type bars. to be actedupon either by a push pin equipped with the'finger piece or a key lever. The rate of acceleration of the type bar would be equal substantially to the sum of the ratesof acceleration of the two flexing connections In the accon'ipanying drawings: Figure 1 is, a diagrammatic view in thena-ture of a longitudinal vertical central section showing the employment of a push pin; Fig.2, a

Specification of Letters Patent.

Applicationfiled October 30, 1908.

Patented June 4t, 1912; Serial No. 460,227.

similar view showing a slightly modified construction of the push pin arrangement 50 Fig. 3, asiinilar view illustrating the employment ofa key lever; Fig. l, is a rear View showing one of the series of vertically disposed reverse toggle connections for operating the type bars; Fig. 5, a rear elev'a- 55 tion showing the general arrangement of key levers and links; Figs. 6 and 7, similar views showing modified constructions in connection with the employment of key levers. i

In Fig. 1, 1 is the platen, 2 the type bar segment, 3 one of the type bars pivoted therein and 4 a push pin towhich is applied the usual finger piece. 5 is a short link hinged at-its front end to a fixed point or part 5 of the frame and at its rear end to a. longer link 6. In the construction shown, the hinged connection between lin s 5, G, is efiecte'd by hinging both of them in the lower end of the push pin at. The rear end of the link 6 is pivotally connected with an 7 upright link 7 rocking about a fixed axis 8 in at segmental piece QZ'and havingconnected with its upper end a link 9 hinged to the heel 3 of thetype bar. 10 is a reaction springapplied to the link 7 and 11 is a back stop rod common to all of the links 7. This figure of the drawing shows one of the central type bars of the segment and its operating devices. In a completely assembled aggregation of-Qtype bars, operating connections and push pins,the axes 8 of the several links 7 would be arranged segmentally or in a curve corresponding generally with the segmental curve in which the axes 3, 2, of the type bars lie. This figure shows but one pushpin. All others in the same bank or row of the key board will preferably be of the same length and their ends would therefore lie in substantially the same horizontal plane and it would follow that the rear ends of link 6 would occupya seg: mental curve' This general arrangement would be obvious to those skilled in the art. \Vhen push pin at is depressed and link 15 swings about its axis 5, link (3 will be pulled finger piece, the type bar head will move through one-half of a degree; during the next quarter, indicated at y, it will move through live and one-half degrees; during the next quarter indicated at is it will move through twenty degrees; and during the final quarter, as indicated at m, it will move through sixty-four degrees. The speed of the type bar both in approaching and receding from the platen will. therefore be very great. This eliminates danger of collision of the bars, affords high speed and fine. capacity for manifold work. The stop 11 is so placed that when the parts are at rest, the point of connection between 7 and 9 and 9 and 3' may be in line with axis 8; or if desired,.the stop may be so placed that links 7 and 9 will incline slightly toward the rear. The result will be that the type bar will be locked against its lock stop or rest preventin rebound therefrom.

In Fig. 2 there is much the same arrangement except that there is a reaction spring 12 applied directly to the type bar and from link 7 'that corresponds with link 7 of Fig. 1 there extends rearwardly a hooked link 1-3 that engages the universal bar 14 which swings about an axis 15 and is normally drawn rearwardly by a spring 16.

In Fig. 3, the parts corresponding to those in Fig. l are similarly lettered. In this instance, however, the front link, marked 5 is pivoted in an upright post mounted in a slot in a. front segmental plate 17 that is capable of adjustment by means of set screws 18. This structure has been shown in Letters Patent heretofore granted to me. In this figure, for clearness of illustration the upper link 9 and horizontal link 6 are each indicated merely by a dotted line and their different positions by a series of dotted lines. Below the axis 8 of link 7 are pivoted arms 19 having extending between their upper ends a universal bar 20 disposed in front of the links 7 in such position as to be acted upon thereby at the proper time. 21 is a reaction spring applied to the universal bar. In the construction of 3, push ins are not em )10 'cd but on the c'ontr'ar Y P a there is a key lever 22 for each type bar having applied to 1t a reaction spring 23. The key levers are pivoted at- 24: and ad]a-- cent their front up-t-urned ends, which are equipped as usual with finger pieces, are guided in the comb plate 25. A link 26, indicated by a dotted line, extends from the key lever to link 5 being connected thereto intermediate its fixed point or axis by 5' and its rear end. The several positions are indicated by dotted lines. In this construction, it is'preferred that the axes 5 of all the curve as shown in patents heretofore granted to me and as stated in connection with Fig. 1. It is preferred that the axes 8 of the various links 7 shall be arranged in to the curve in.which the axes of the type bars are disposed. In this. case, as in Fig. 1, there is a very high acceleration of the type bar in its excursion from its position of rest to the printing point. During the first quarter of depression of the key lever, the type bar head will move through two degrees; during the next quarter, through eight degrees; during the third quarter through twenty-nine degrees; and during the final quarter through fifty-one degrees. In the construction illustrated, the type bars are also looked against rebound from their rest.

radial and segmental arrangement of the type bars and links 9, 7, and the disposition of links 26 extending from the key levers to the short front links 5, 2.

Fig. 6 shows an arrangement very similar to Fig. 3. The construction and operation are obvious. A reaction spring is applied under each type bar and the universal bar is located under the key levers and the each key lever. In the construction of Fig. 6, the point of connection of link 6 with link 7 is much closer the point of fiexure of connection composed of the links 7 and 9 than is the case in Figs. 1 and 3.

' links 9 and 7 at their point of fiexure and the link 26 extending from the key lever 22 is connected directly at the point of flexure between, the links 5 and 6. A reaction extension spring is applied to the top of each key lever and a like reaction spring applied to the heel of each type bar.

This invention is glearly applicable either to platen or segmental shift machines. Of course, in the case of platen shift any appropriate or usual form of platen or carriage shift mechanism may be employed I11 the event of a segmental shift being used, the segment 27 in which are pivoted the several links 7 would be rigidly connected with type bar segment 2.

I claim:

A type bar actuatingmechanism, coma segmental curve conforming more or less Fig. 5 is a rear view showing the general reaction compression spring applied under.

In Fig. 7, the link 6 is connected with i links 5 shall be arranged in a segmental.

prising two conneotedbreaking or ace'eleratends on depression of its corresponding ing toggle connectionsone disposedvertifinger piece. 10 cally between each type bar and a fixed In testimony whereof, I have hereunto point and the other extending forward unsubscribed'niy name.

der the type 10a]? to a fixed point, a universal EDVARD B. HESS. bar acted upon by the first named toggle Witnesses: connection and means acting on the second F. C. JoU'rRAs,

named toggle connection intermediate its E. J, SHEEHAN. 

